Never tried Biancisarti, or a Spritz made with it. Never had it suggested by the bartenders either, if I ask for a Spritz they always ask with Aperol or without.
Here they ask " Aperol or Campari ? "
Biancosarti is sweeter than Aperol and winey, Biancosarti spritz tastes like a sweet wine, but you don't realize immediately the punch it packs.